WN4.5 star setâre-ye WN4.5 Fr.: étoile WN4.5 A → WN Wolf-Rayet star whose spectrum shows the following emission line characteristics: N IV 3479-3484, 4058 Å stronger than N V 3479-3484, 4058 Å and N III 4634-4641, 5314 Å weak or absent. See also: W, from → Wolf-Rayet; N, from → nitrogen; → star. |